Lerp和SmoothDamp比較

Lerp更像是線性衰減，而SmoothDamp像是弧形衰減，兩者都是由快而慢

其中SmoothDamp多用于相機跟随。

SmoothDamp:

transform.position = Vector3.SmoothDamp(transform.position, target.position, ref velocity, smoothTime);      

Lerp:

transform.position = Vector3.Lerp(transform.position, target.position, 0.1f);